2016 Update

Task/Averages-Mode/Rust/averages-mode.rust

@@ -0,0 +1,31 @@
+use std::collections::HashMap;
+
+fn main() {
+    let mode_vec1 = mode(vec![ 1, 3, 6, 6, 6, 6, 7, 7, 12, 12, 17]);
+    let mode_vec2 = mode(vec![ 1, 1, 2, 4, 4]);
+
+    println!("Mode of vec1 is: {:?}", mode_vec1);
+    println!("Mode of vec2 is: {:?}", mode_vec2);
+
+    assert!( mode_vec1 == [6], "Error in mode calculation");
+    assert!( (mode_vec2 == [1, 4]) || (mode_vec2 == [4,1]), "Error in mode calculation" );
+}
+
+fn mode(vs: Vec<i32>) -> Vec<i32> {
+    let mut vec_mode = Vec::new();
+    let mut seen_map = HashMap::new();
+    let mut max_val = 0;
+    for i in vs{
+        let ctr = seen_map.entry(i).or_insert(0);
+        *ctr += 1;
+        if *ctr > max_val{
+            max_val = *ctr;
+        }
+    }
+    for (key, val) in seen_map {
+        if val == max_val{
+            vec_mode.push(key);
+        }
+    }
+    vec_mode
+}